Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457848
H. Karimi, Martin Fenton, G. Lapierre, E. Fournier
NA
{"title":"European Harmonized Technical Conditions and Band Plans for Broadband Wireless Access in the 790-862 MHz Digital Dividend Spectrum","authors":"H. Karimi, Martin Fenton, G. Lapierre, E. Fournier","doi":"10.1109/DYSPAN.2010.5457848","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457848","url":null,"abstract":"NA","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132238169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457858
Vincent J. Kovarik, Jr., R. DeSalvo
Dynamic Spectrum Access (DSA) technology has the potential to significantly improve communications performance in environments where the radio's operational spectrum may encounter electromagnetic energy sources with intermittent spectral occupancy, distributed interference sources, and variable noise floors. By sensing the environment, the radio can adjust its communications frequency based on environmental observations. Work to date has primarily focused on sensing technology and algorithms for coordinating dynamic frequency selection in the commercial radio frequency (RF) space. However, the technology must be proven on the battlefield, in existing tactical radio systems in order to benefit the military user. Radio resource capabilities and the unique constraints of tactical waveforms present several significant challenges. This paper presents an initial experiment inserting DSA technology into the Harris Falcon III hand-held, tactical radio system. Issues and problems unique to the tactical radio environment are presented and approaches discussed. Tests and demonstration results are presented and the paper closes with a discussion of additional challenges facing the insertion of DSA technology in tactical radio systems.
{"title":"Enabling Dynamic Spectrum Access in a Tactical Radio System: A Case Study","authors":"Vincent J. Kovarik, Jr., R. DeSalvo","doi":"10.1109/DYSPAN.2010.5457858","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457858","url":null,"abstract":"Dynamic Spectrum Access (DSA) technology has the potential to significantly improve communications performance in environments where the radio's operational spectrum may encounter electromagnetic energy sources with intermittent spectral occupancy, distributed interference sources, and variable noise floors. By sensing the environment, the radio can adjust its communications frequency based on environmental observations. Work to date has primarily focused on sensing technology and algorithms for coordinating dynamic frequency selection in the commercial radio frequency (RF) space. However, the technology must be proven on the battlefield, in existing tactical radio systems in order to benefit the military user. Radio resource capabilities and the unique constraints of tactical waveforms present several significant challenges. This paper presents an initial experiment inserting DSA technology into the Harris Falcon III hand-held, tactical radio system. Issues and problems unique to the tactical radio environment are presented and approaches discussed. Tests and demonstration results are presented and the paper closes with a discussion of additional challenges facing the insertion of DSA technology in tactical radio systems.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116294597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457907
Shabnam Sodagari, A. Attar, S. Bilén
In this paper, we investigate the design of a truthful auction for the case when a primary spectrum owner is willing to lease its idle spectral resources in sequential time periods. The secondary cognitive radios participate in the spectrum sharing auction by declaring to the primary their types, which consist of their arrival and departure time instances and valuations. The adapted methodology aims at reducing the collusion incentive among secondary users through the proper choice of the pricing policy and replacing second-price policy, such as in Vickrey-Clarke-Grove (VCG) auctions, by the critical value auction. Furthermore, the proposed auction is dynamic and is performed on-line, in contrast to static off-line schemes such as VCG. Simulation results confirm the anti-cheating property of the proposed auction scheme.
{"title":"Strategies to Achieve Truthful Spectrum Auctions for Cognitive Radio Networks Based on Mechanism Design","authors":"Shabnam Sodagari, A. Attar, S. Bilén","doi":"10.1109/DYSPAN.2010.5457907","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457907","url":null,"abstract":"In this paper, we investigate the design of a truthful auction for the case when a primary spectrum owner is willing to lease its idle spectral resources in sequential time periods. The secondary cognitive radios participate in the spectrum sharing auction by declaring to the primary their types, which consist of their arrival and departure time instances and valuations. The adapted methodology aims at reducing the collusion incentive among secondary users through the proper choice of the pricing policy and replacing second-price policy, such as in Vickrey-Clarke-Grove (VCG) auctions, by the critical value auction. Furthermore, the proposed auction is dynamic and is performed on-line, in contrast to static off-line schemes such as VCG. Simulation results confirm the anti-cheating property of the proposed auction scheme.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124400865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457861
S. Ganesan, M. Sellathurai, T. Ratnarajah
Opportunistic interference projection (OIP) is a cognitive radio (CR) scheme thats enables secondary users to co-exist with the licensed primary users in a spectrum sharing system and thereby improving the spectrum utilization. The presence of multiple cognitive terminals offer multiuser diversity gain, which enhances the throughput performance. Interference projection techniques works well when the transmitters have perfect channel knowledge, which is quite unrealistic assumption in real-time. In this paper, we investigate the benefits of multiuser diversity and the application of limited feedback precoding schemes for CR network with a primary and multiple cognitive MIMO links. The primary receiver feedbacks the codebook index corresponding to the precoding matrix to the cognitive transmitter through a finite rate feedback. The cognitive receiver involves in the selection of the cognitive transmitter that maximizes the system throughput performance. We present numerical simulation results of the data rate achieved in both the links for various system settings.
{"title":"Opportunistic Interference Projection in Cognitive MIMO Radio with Multiuser Diversity","authors":"S. Ganesan, M. Sellathurai, T. Ratnarajah","doi":"10.1109/DYSPAN.2010.5457861","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457861","url":null,"abstract":"Opportunistic interference projection (OIP) is a cognitive radio (CR) scheme thats enables secondary users to co-exist with the licensed primary users in a spectrum sharing system and thereby improving the spectrum utilization. The presence of multiple cognitive terminals offer multiuser diversity gain, which enhances the throughput performance. Interference projection techniques works well when the transmitters have perfect channel knowledge, which is quite unrealistic assumption in real-time. In this paper, we investigate the benefits of multiuser diversity and the application of limited feedback precoding schemes for CR network with a primary and multiple cognitive MIMO links. The primary receiver feedbacks the codebook index corresponding to the precoding matrix to the cognitive transmitter through a finite rate feedback. The cognitive receiver involves in the selection of the cognitive transmitter that maximizes the system throughput performance. We present numerical simulation results of the data rate achieved in both the links for various system settings.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116420224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457882
R. Tandra, A. Sahai, V. Veeravalli
Cognitive radio systems must robustly sense spectrum holes if they want to use spectrum opportunistically. A traditional sensitivity based time-domain perspective on this sensing problem is relatively straightforward and such sensitivity based sensors are easy to certify. However, this problem is more subtle than it first appears. To really understand the question of {em what should be the right level of sensitivity for a sensor?}, especially for multi-user sensing algorithms, one is forced to think more deeply about the spatial dimension of sensing and the role of fading. In this paper we propose a framework to model the joint space-time dimension of spectrum sensing. This framework naturally gives us reasonable approximate metrics that capture the two desirable features of a spectrum sensor: safety to primary users and performance for the cognitive radios. It is the tradeoff between these two that is fundamental. This framework helps us to quantify the tradeoff between space and time. By simulating the space-time performance of a single-radio energy detector we see that there is tension between the performance in time and the performance in space for a fixed value of protection to the primary user.
{"title":"Space-Time Metrics for Spectrum Sensing","authors":"R. Tandra, A. Sahai, V. Veeravalli","doi":"10.1109/DYSPAN.2010.5457882","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457882","url":null,"abstract":"Cognitive radio systems must robustly sense spectrum holes if they want to use spectrum opportunistically. A traditional sensitivity based time-domain perspective on this sensing problem is relatively straightforward and such sensitivity based sensors are easy to certify. However, this problem is more subtle than it first appears. To really understand the question of {em what should be the right level of sensitivity for a sensor?}, especially for multi-user sensing algorithms, one is forced to think more deeply about the spatial dimension of sensing and the role of fading. In this paper we propose a framework to model the joint space-time dimension of spectrum sensing. This framework naturally gives us reasonable approximate metrics that capture the two desirable features of a spectrum sensor: safety to primary users and performance for the cognitive radios. It is the tradeoff between these two that is fundamental. This framework helps us to quantify the tradeoff between space and time. By simulating the space-time performance of a single-radio energy detector we see that there is tension between the performance in time and the performance in space for a fixed value of protection to the primary user.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121970095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457890
S. Kawade, M. Nekovee
There is a growing demand for high data-rate mobile and indoor services at a reasonable cost, and using an indoor wireless system at end of the ADSL+ or fibre line is one potential way of meeting this demand. Industry players such as fixed-line and cellular operators have adopted similar approaches but based around different wireless technologies such as WiFi or HSPA femtocells and potentially LTE/WiMAX in the future. However due to issues related to interference in the license-exempt band and limited spectrum availability in the licensed band there are some doubts as to whether or not the available wireless options will be able to effectively distribute the high bandwidths within a home environment. With use of cognitive radio technology, the digital TV switchover program, offers a potential opportunity to address this issue. The aim of this paper is to assess the feasibility of using the TV White Space(TVWS) spectrum for home networking services and compare the performance with that of other license-exempt spectral bands, namely 2.4 GHz and 5 GHz ISM band. It studies the limitations in presence of interference and identifies the operating conditions when the system performance would start to become unacceptable. Using analytical and simulation techniques, it is shown that the performance of TVWS spectral outperforms the 5 GHz and 2.4 GHz for low to medium traffic loadings (around 2 Mb/s per home) at significantly lower energy requirements. However, to achieve these gains (a) the use of spectrum aggregation techniques and (b) operation at low power levels, i.e, below 3 dBm per channel becomes essential. The work also shows that for heavy traffic loadings (6 Mb/s and above per home) in dense deployment densities, TVWS band should be used as complementary interface for congestion relief instead. end{abstract}
{"title":"Can Cognitive Radio Access to TV White Spaces Support Future Home Networks?","authors":"S. Kawade, M. Nekovee","doi":"10.1109/DYSPAN.2010.5457890","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457890","url":null,"abstract":"There is a growing demand for high data-rate mobile and indoor services at a reasonable cost, and using an indoor wireless system at end of the ADSL+ or fibre line is one potential way of meeting this demand. Industry players such as fixed-line and cellular operators have adopted similar approaches but based around different wireless technologies such as WiFi or HSPA femtocells and potentially LTE/WiMAX in the future. However due to issues related to interference in the license-exempt band and limited spectrum availability in the licensed band there are some doubts as to whether or not the available wireless options will be able to effectively distribute the high bandwidths within a home environment. With use of cognitive radio technology, the digital TV switchover program, offers a potential opportunity to address this issue. The aim of this paper is to assess the feasibility of using the TV White Space(TVWS) spectrum for home networking services and compare the performance with that of other license-exempt spectral bands, namely 2.4 GHz and 5 GHz ISM band. It studies the limitations in presence of interference and identifies the operating conditions when the system performance would start to become unacceptable. Using analytical and simulation techniques, it is shown that the performance of TVWS spectral outperforms the 5 GHz and 2.4 GHz for low to medium traffic loadings (around 2 Mb/s per home) at significantly lower energy requirements. However, to achieve these gains (a) the use of spectrum aggregation techniques and (b) operation at low power levels, i.e, below 3 dBm per channel becomes essential. The work also shows that for heavy traffic loadings (6 Mb/s and above per home) in dense deployment densities, TVWS band should be used as complementary interface for congestion relief instead. end{abstract}","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128162922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457901
V. Gonçalves, S. Delaere
In the context of telecommunications networks, the concept of self-organisation implies the introduction of functionalities that lead to the automation of network operational tasks and reduce the need for manual intervention, as well as the provision of DSA mechanisms and enhancement of radio resource management, improvement of QoS and QoE and reduction of OPEX. Based on the definitions of Self-Organising Networks (SONs) and self-x functionalities developed within the EU FP7 project E3, as well as on a methodology that systematically correlates technical functionalities, KPIs and business parameters, this paper intends to assess the impact of the introduction of self-x functionalities on the business of operators. In particular, it shows that self-configuration is relevant in the control of operators' assets as well as keeping a direct relationship with the customer, while self-managing has a high impact on the decentralisation of the architecture, on the simplification of OAM tasks and efficient monitoring of the system. In addition, self-optimisation contributes to an improved QoS and to the delivery of an optimised price/quality ratio in terms of service provision. Nevertheless, important trade-offs and challenges need to be overcome: barriers for commercial development due to lack of incentives for equipment vendors, standardisation activities towards multi-vendor SON solutions and the right balance between quality of service and customer intimacy.
{"title":"Business Impact Assessment of Mobile Self-Organising Networks","authors":"V. Gonçalves, S. Delaere","doi":"10.1109/DYSPAN.2010.5457901","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457901","url":null,"abstract":"In the context of telecommunications networks, the concept of self-organisation implies the introduction of functionalities that lead to the automation of network operational tasks and reduce the need for manual intervention, as well as the provision of DSA mechanisms and enhancement of radio resource management, improvement of QoS and QoE and reduction of OPEX. Based on the definitions of Self-Organising Networks (SONs) and self-x functionalities developed within the EU FP7 project E3, as well as on a methodology that systematically correlates technical functionalities, KPIs and business parameters, this paper intends to assess the impact of the introduction of self-x functionalities on the business of operators. In particular, it shows that self-configuration is relevant in the control of operators' assets as well as keeping a direct relationship with the customer, while self-managing has a high impact on the decentralisation of the architecture, on the simplification of OAM tasks and efficient monitoring of the system. In addition, self-optimisation contributes to an improved QoS and to the delivery of an optimised price/quality ratio in terms of service provision. Nevertheless, important trade-offs and challenges need to be overcome: barriers for commercial development due to lack of incentives for equipment vendors, standardisation activities towards multi-vendor SON solutions and the right balance between quality of service and customer intimacy.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129938973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457909
P. Marshall, P. Kolodzy
Much of the consideration of Dynamic Spectrum Access has been focused on its ability to provide secondary spectrum sharing without any impact on primary users of the spectrum. It has been typically assumed that these benefits would be exploited for unlicensed, or secondary uses of spectrum. This paper argues that the benefits of DSA are significant, even for licensed users, and that DSA regimes could offer both benefits to primary users, while creating opportunities for secondary sharing. Such a regime might avoid "zero-sum" contention over establishing DSA policies. It is further pointed out that interference mechanisms are being included in the design of emerging wireless technology, and that these features constitute a homogeneous version of DSA. The extension of these to heterogeneous uses is a logical next step.
{"title":"A Potential Alliance for World-Wide Dynamic Spectrum Access","authors":"P. Marshall, P. Kolodzy","doi":"10.1109/DYSPAN.2010.5457909","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457909","url":null,"abstract":"Much of the consideration of Dynamic Spectrum Access has been focused on its ability to provide secondary spectrum sharing without any impact on primary users of the spectrum. It has been typically assumed that these benefits would be exploited for unlicensed, or secondary uses of spectrum. This paper argues that the benefits of DSA are significant, even for licensed users, and that DSA regimes could offer both benefits to primary users, while creating opportunities for secondary sharing. Such a regime might avoid \"zero-sum\" contention over establishing DSA policies. It is further pointed out that interference mechanisms are being included in the design of emerging wireless technology, and that these features constitute a homogeneous version of DSA. The extension of these to heterogeneous uses is a logical next step.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124301698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457914
Kate Harrison, S. M. Mishra, A. Sahai
The Nov 2008 FCC ruling allowing access to the television whitespaces prompts a natural question. What is the magnitude and geographic distribution of the opportunity that has been opened up? This paper takes a semi-empirical perspective and uses the FCC's database of television transmitters, USA~census data from 2000, and standard wireless propagation and information-theoretic capacity models to see the distribution of {bf data-rates available on a per-person basis} for wireless Internet access across the continental USA. To get a realistic evaluation of the potential public benefit, we need to examine more than just how many whitespace channels have been made available. It is also important to consider the wireless ``pollution'' from existing television stations, the self-interference among whitespace devices themselves, the population distribution, and the expected transmission range of the whitespace devices. The clear advantage of the whitespace approach is revealed through a direct comparison of the Pareto frontier of the new white-space approach and that corresponding to the traditional approach of refarming bands between television and wireless data service. Finally, the critical importance of economic investment considerations is shown by considering the status of rural vs urban areas. Based on technical considerations alone, whether we consider long or short-range whitespace systems, people in rural areas would seem to be the main beneficiaries of white-space systems. In fact, a power-law distribution is found that suggests that many rural customers would enjoy tremendous data-rates. However, the fundamental need to recover investments by wireless ISPs couples the range to the population density. This clips the tail of the power-law and shows that urban areas actually get significant benefit from the TV whitespaces. Overall, the opportunity provided by TV whitespaces is shown to be potentially of the same order as the recent release of ``beachfront'' 700MHz spectrum for wireless data service.
{"title":"How Much White-Space Capacity Is There?","authors":"Kate Harrison, S. M. Mishra, A. Sahai","doi":"10.1109/DYSPAN.2010.5457914","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457914","url":null,"abstract":"The Nov 2008 FCC ruling allowing access to the television whitespaces prompts a natural question. What is the magnitude and geographic distribution of the opportunity that has been opened up? This paper takes a semi-empirical perspective and uses the FCC's database of television transmitters, USA~census data from 2000, and standard wireless propagation and information-theoretic capacity models to see the distribution of {bf data-rates available on a per-person basis} for wireless Internet access across the continental USA. To get a realistic evaluation of the potential public benefit, we need to examine more than just how many whitespace channels have been made available. It is also important to consider the wireless ``pollution'' from existing television stations, the self-interference among whitespace devices themselves, the population distribution, and the expected transmission range of the whitespace devices. The clear advantage of the whitespace approach is revealed through a direct comparison of the Pareto frontier of the new white-space approach and that corresponding to the traditional approach of refarming bands between television and wireless data service. Finally, the critical importance of economic investment considerations is shown by considering the status of rural vs urban areas. Based on technical considerations alone, whether we consider long or short-range whitespace systems, people in rural areas would seem to be the main beneficiaries of white-space systems. In fact, a power-law distribution is found that suggests that many rural customers would enjoy tremendous data-rates. However, the fundamental need to recover investments by wireless ISPs couples the range to the population density. This clips the tail of the power-law and shows that urban areas actually get significant benefit from the TV whitespaces. Overall, the opportunity provided by TV whitespaces is shown to be potentially of the same order as the recent release of ``beachfront'' 700MHz spectrum for wireless data service.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116705154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-04-06DOI: 10.1109/DYSPAN.2010.5457917
M. Živković, Dominik Auras, R. Mathar
Optimal utilization of radio resources (bandwidth, transmit power) in multi-carrier based systems becomes very challenging due to coexistence of various wireless standards within the same frequency band. One possible solution is dynamic spectrum access (DSA) approach that allows several standards or users to opportunistically share the available spectrum resources without introducing mutual interference. Proposed demonstration, implemented in GNU Radio framework, enables interference-free coexistence of two OFDM-based systems within a common frequency band with optimally configured transmission parameters for given system constraints. Furthermore, a highly reconfigurable framework allows for implementation and evaluation of various transmission strategies for different DSA scenarios, different classes of given requirements and various sets of controllable parameters.
{"title":"OFDM-Based Dynamic Spectrum Access","authors":"M. Živković, Dominik Auras, R. Mathar","doi":"10.1109/DYSPAN.2010.5457917","DOIUrl":"https://doi.org/10.1109/DYSPAN.2010.5457917","url":null,"abstract":"Optimal utilization of radio resources (bandwidth, transmit power) in multi-carrier based systems becomes very challenging due to coexistence of various wireless standards within the same frequency band. One possible solution is dynamic spectrum access (DSA) approach that allows several standards or users to opportunistically share the available spectrum resources without introducing mutual interference. Proposed demonstration, implemented in GNU Radio framework, enables interference-free coexistence of two OFDM-based systems within a common frequency band with optimally configured transmission parameters for given system constraints. Furthermore, a highly reconfigurable framework allows for implementation and evaluation of various transmission strategies for different DSA scenarios, different classes of given requirements and various sets of controllable parameters.","PeriodicalId":106204,"journal":{"name":"2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128832044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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